Corporations are free to merge with many other corporations, while polygamy is still illegal for 'people' in most states.
Polygamy is not a merger. Mergers turn multiple entities into one single thing. Polygamy still retains the individual people. The appropriate analogy would be cannibalism, and even that is wrong since mergers are usually mutually beneficial.
Corporations are allowed to have business practices such as "cutting off the competitor's air supply" while murder is still illegal for 'people'.
As long as their business practices are legal, it is nothing like murder. If the business practices are illegal, then there is no argument.
Corporations are allowed to be dissolved yet Suicide is illegal for 'people' to commit.
Corporate dissolution is not like suicide. Suicide destroys the value inherent in the person, whereas dissolution only destroys the company's name. The better analogy would be more like a divorce, where the parents split up the property and change their names. Again, that's all quite legal and isn't special treatment for corporations.
Corporations can have 'hostile takeovers' of other weaker corporations, but armed robbery, slavery, and blackmail are all still illegal for other categories of 'people'.
Robbery is theft. A hostile takeover isn't theft. It is a purchase of ownership. The two are not alike at all. As for slavery, a hostile takeover has nothing like it. Slavery doesn't apply because you aren't allowed to treat people like property. Company ownership is property and is traded every day. And blackmail doesn't even apply.
You also ignore that there are many laws that apply only to businesses and not to people. When was the last time you:
There are lots of problems with how we treat companies like people -- we agree on that. But your analogies don't add to that argument.
Real Programmers don't eat quiche. They eat Twinkies and Szechwan food.